Что такое "Molar ellipticity"?

[nata30071]

что такое "Molar ellipticity"? Перевожу статьи европейской фармакопеи, не могу перевести данный показатель, он упоминается при определении кругового дихроизма, выражается в степенях.

[aversun]

что такое "Molar ellipticity"? Перевожу статьи европейской фармакопеи, не могу перевести данный показатель, он упоминается при определении кругового дихроизма, выражается в степенях.

 

Molar Ellipticity (q)m

Molar ellipticity is a little used unit which has the dimensions degrees decilitres mol -1 decimeter-1 . DichroWeb does not accept data in units of (q)m, but such data may be converted to units of DE by using the following formula, where Nr represents the number of amino acids in the protein :

DE = (q)m * Nr / 3298

If you have data in units of (q)m, please convert the values to units of DE and then submit to DichroWeb.

 

Molar ellipticity ([]) is CD corrected for concentration. The units of molar ellipticity are historical (deg×cm²/dmol). Conversion from molar extinction (absorbance corrected for concentration) to molar ellipticity uses a factor of 3298 ([] = 3298). To calculate molar ellipticity, the sample concentration (g/L), cell pathlength (cm), and the molecular weight (g/mol) must be known. If the sample is a protein, the mean residual weight (average molecular weight of the amino acids it contains) is used in place of the molecular weight, essentially treating the protein as a solution of amino acids.